Britax Safe-n-Sound BS4900A-020130 Series Instructions For Installation & Use page 10

HOW TO SETUP
ADJUSTING BASE EXTENSION
This booster seat has a base extension which can
be easily adjusted by rotating the knob. This is to
accommodate the leg length of larger children.
When should the base be extended?
Extend the base so that the front edge of the base
is close to the back of your child's knees. The
upper thigh section of their legs will be supported
and the seating position is made more comfortable
by reducing pressure points.
ADJUSTING THE SIDE WINGS
The Adjustable Side Wings can be adjusted to
provide more width for a larger child or can be
kept narrow to reduce the width of the Booster
seat.
To adjust, hold seat or headrest with one hand
and use the other hand to lift up side wing and
rotate, let it click down into place, then do the
same for the other side wing.
When should the wings be adjusted?
When your childs arms and shoulders require
more room within the seat, adjust the expandable
side wings to the widest position to create more
space for your child. Alternatively keep narrow if
there are width restrictions in the car.
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Instructions for Installation & Use - Series No. BS4900A-020130
Rotate to lengthen base
2. Push back
1. Lift
ADJUSTING THE SECUREGUARD™ DEVICE
The SecureGuard™ Device crotch strap must be
adjusted so that it fits the seatbelt correctly to the
child. The crotch strap length adjuster can be found
under the seat. The seat base trim will need to be
removed to aid adjustment.
A. Underneath the base the length of the crotch
strap can be adjusted by threading webbing
through the adjuster in the direction of the arrows
shown below.
B. Adjust the crotch straps of the SecureGuard™
Device so that the Lap portion of the seatbelt
is positioned as low as possible on the child's
hips and thighs and the lap belt is prevented
from rising up the abdomen. Ensure the
SecureGuard™ Device does not push into your
child's thighs as this may cause discomfort.
Adjust the crotch strap to a shorter length when
using the seat with a smaller child.
SecureGuard™ position
TOO HIGH
CAUTION:
ALWAYS USE THE SECUREGUARD™ DEVICE
The SecureGuard™ Device must always be setup to position the lap belt correctly on
the child's hips and thighs. The occupant may be injured in an vehicle crash if the
SecureGuard™ Device is set too high. DO NOT attempt to remove or dismantle the crotch
strap and SecureGuard™ Device.
Instructions for Installation & Use - Series No. BS4900A-020130
HOW TO SETUP
Under booster seat
Adjuster
TO SHORTEN TO LENGTHEN
SecureGuard™ position
OK
Bottom edge of
SecureGuard™
Device level
with top of legs
(with all slack
removed from
crotch straps).
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